I am facing a serious problem with my menstrual cycle. I am getting my periods every 15 days. i have this problem since one year now. I was in India last year and i was having pills for the same which did help but now that I am in US this problem has attacked me once again. its very depressing. My hemoglobin too has dropped down to 8.1. I am in dire need of help. please advice me on this.